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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2023 Leszek Koltunski //
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// //
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// This file is part of Magic Cube. //
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// //
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// Magic Cube is proprietary software licensed under an EULA which you should have received //
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// along with the code. If not, check https://distorted.org/magic/License-Magic-Cube.html //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.solvers;
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import static org.distorted.objectlib.tablebases.TBSkewb.FIXED;
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import static org.distorted.objectlib.tablebases.TBSkewb.FREE;
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import android.content.res.Resources;
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import org.distorted.main.R;
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import org.distorted.objectlib.helpers.OperatingSystemInterface;
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import org.distorted.objectlib.metadata.ListObjects;
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import org.distorted.objectlib.main.TwistyObject;
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import org.distorted.objectlib.tablebases.ImplementedTablebasesList;
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import org.distorted.objectlib.tablebases.TBSkewb;
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import org.distorted.objectlib.tablebases.TablebaseHelpers;
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import org.distorted.objectlib.tablebases.TablebasesAbstract;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public class SolverSkewb extends SolverTablebase
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{
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private static final int ERROR_CORNER_135_MISSING = -1;
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private static final int ERROR_CORNER_134_MISSING = -2;
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private static final int ERROR_CORNER_125_MISSING = -3;
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private static final int ERROR_CORNER_124_MISSING = -4;
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private static final int ERROR_CORNER_035_MISSING = -5;
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private static final int ERROR_CORNER_034_MISSING = -6;
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private static final int ERROR_CORNER_025_MISSING = -7;
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private static final int ERROR_CORNER_024_MISSING = -8;
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private static final int ERROR_CENTER_0_MISSING = -9;
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private static final int ERROR_CENTER_1_MISSING = -10;
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private static final int ERROR_CENTER_2_MISSING = -11;
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private static final int ERROR_CENTER_3_MISSING = -12;
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private static final int ERROR_CENTER_4_MISSING = -13;
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private static final int ERROR_CENTER_5_MISSING = -14;
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private static final int ERROR_CORNERS_CANNOT = -15;
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private static final int ERROR_CORNER_TWISTED = -16;
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private static final int ERROR_TWO_CENTERS = -17;
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private static final int ERROR_TWO_CORNERS = -18;
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private static final int ERROR_FREE_CORNERS_NOT_EVEN = -19;
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private static final int ERROR_FREE_CORNERS_ROTATED = -20;
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private TablebasesAbstract mSolver;
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private final int[] mFaceColors;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public SolverSkewb(OperatingSystemInterface os, Resources res, TwistyObject object)
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{
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super(os,res,object);
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mFaceColors = new int[6];
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void getCorners(TwistyObject object, int[][] corners)
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{
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for(int i=0; i<8; i++)
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for(int j=0; j<3; j++)
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corners[i][j] = object.getCubitFaceStickerIndex(i,j);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void createCenterPermutation(int[] output, int[] symbols, int[] perm)
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{
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for(int s=0; s<6; s++)
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{
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int symbol = symbols[s];
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for(int p=0; p<6; p++)
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if( perm[p]==symbol )
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{
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output[s] = p;
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break;
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int getCenters(TwistyObject object, int[] out)
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{
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final int[] map = {4,5,2,3,0,1};
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int[] tmp = new int[6];
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int[] mcl = new int[6];
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boolean[] present = new boolean[6];
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for(int i=0; i<6; i++)
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{
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int color = object.getCubitFaceStickerIndex(i+8,0) - 6;
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present[color] = true;
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tmp[i] = color;
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}
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if( !present[0] ) return ERROR_CENTER_0_MISSING;
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if( !present[1] ) return ERROR_CENTER_1_MISSING;
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if( !present[2] ) return ERROR_CENTER_2_MISSING;
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if( !present[3] ) return ERROR_CENTER_3_MISSING;
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if( !present[4] ) return ERROR_CENTER_4_MISSING;
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if( !present[5] ) return ERROR_CENTER_5_MISSING;
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for(int i=0; i<6; i++) mcl[i] = map[mFaceColors[i]];
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createCenterPermutation(out,mcl,tmp);
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int commonCornerColor(int[] c1, int[] c2)
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{
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int theSame = 0;
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int index = 0;
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for(int i=0; i<3; i++)
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for(int j=0; j<3; j++)
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if( c1[i]==c2[j] )
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{
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index = i;
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theSame++;
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}
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return theSame==1 ? c1[index] : ERROR_CORNERS_CANNOT;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int computeFaceColors(int[][] corners, int[] output)
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{
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final int[][] corner_indices = { {0,3},{5,6},{0,5},{6,3},{0,6},{3,5} };
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for(int i=0; i<6; i++)
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{
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int c1 = corner_indices[i][0];
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int c2 = corner_indices[i][1];
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output[i] = commonCornerColor(corners[c1],corners[c2]);
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if( output[i]<0 ) return ERROR_CORNERS_CANNOT;
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}
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private boolean cornerIs(int[] corner, int f0, int f1, int f2)
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{
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int c0 = mFaceColors[f0];
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int c1 = mFaceColors[f1];
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int c2 = mFaceColors[f2];
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return ( (corner[0]==c0 && corner[1]==c1 && corner[2]==c2 ) ||
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(corner[1]==c0 && corner[2]==c1 && corner[0]==c2 ) ||
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(corner[2]==c0 && corner[0]==c1 && corner[1]==c2 ) );
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int checkAllCornersPresent(int[][] corners)
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{
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boolean[] present = new boolean[8];
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for(int i=0; i<8; i++)
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{
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if( cornerIs(corners[i],4,2,0) ) present[0]=true;
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if( cornerIs(corners[i],2,5,0) ) present[1]=true;
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if( cornerIs(corners[i],3,4,0) ) present[2]=true;
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if( cornerIs(corners[i],5,3,0) ) present[3]=true;
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if( cornerIs(corners[i],1,2,4) ) present[4]=true;
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if( cornerIs(corners[i],5,2,1) ) present[5]=true;
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if( cornerIs(corners[i],4,3,1) ) present[6]=true;
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if( cornerIs(corners[i],1,3,5) ) present[7]=true;
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}
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if( !present[0] ) return ERROR_CORNER_024_MISSING;
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if( !present[1] ) return ERROR_CORNER_025_MISSING;
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if( !present[2] ) return ERROR_CORNER_034_MISSING;
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if( !present[3] ) return ERROR_CORNER_035_MISSING;
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if( !present[4] ) return ERROR_CORNER_124_MISSING;
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if( !present[5] ) return ERROR_CORNER_125_MISSING;
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if( !present[6] ) return ERROR_CORNER_134_MISSING;
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if( !present[7] ) return ERROR_CORNER_135_MISSING;
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int retFreeCornerPermutation(int[] perm, int[][] corners)
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{
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perm[0] = -1;
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perm[1] = -1;
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perm[2] = -1;
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perm[3] = -1;
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for(int i=0; i<4; i++)
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{
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int[] cor = corners[FREE[i]];
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if( cornerIs(cor,2,5,0) ) perm[0] = i;
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if( cornerIs(cor,3,4,0) ) perm[1] = i;
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if( cornerIs(cor,1,2,4) ) perm[2] = i;
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if( cornerIs(cor,1,3,5) ) perm[3] = i;
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}
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if( perm[0]==-1 ) return ERROR_CORNER_025_MISSING;
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if( perm[1]==-1 ) return ERROR_CORNER_034_MISSING;
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if( perm[2]==-1 ) return ERROR_CORNER_124_MISSING;
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if( perm[3]==-1 ) return ERROR_CORNER_135_MISSING;
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return 0;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private void computeCornerQuats(int[] quats, int[][] corners, int[] perm)
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{
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final int[] zeroeth_face_map = { 4,2,3,5,1,5,4,1 };
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int[] twist = new int[8];
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for(int i=0; i<4; i++)
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{
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int fi = FIXED[i];
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int colorFi = mFaceColors[zeroeth_face_map[fi]];
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int[] cFi = corners[fi];
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if( cFi[0]==colorFi ) twist[fi] = 0;
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else if( cFi[1]==colorFi ) twist[fi] = 1;
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else twist[fi] = 2;
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}
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int[] inv_perm = new int[4];
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TablebaseHelpers.invertPermutation(perm,inv_perm);
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int common14 = commonCornerColor(corners[1], corners[4]);
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int common27 = commonCornerColor(corners[2], corners[7]);
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int common47 = commonCornerColor(corners[4], corners[7]);
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int index;
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int[] c;
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index = FREE[inv_perm[0]];
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c = corners[FREE[0]];
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if(c[0]==common14) twist[index] = 0;
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else if(c[1]==common14) twist[index] = 2;
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else twist[index] = 1;
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index = FREE[inv_perm[1]];
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c = corners[FREE[1]];
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if(c[0]==common27) twist[index] = 0;
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else if(c[1]==common27) twist[index] = 2;
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else twist[index] = 1;
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index = FREE[inv_perm[2]];
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c = corners[FREE[2]];
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if(c[0]==common47) twist[index] = 0;
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else if(c[1]==common47) twist[index] = 2;
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else twist[index] = 1;
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index = FREE[inv_perm[3]];
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c = corners[FREE[3]];
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if(c[0]==common47) twist[index] = 0;
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else if(c[1]==common47) twist[index] = 2;
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else twist[index] = 1;
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TBSkewb.fillInQuats(quats,perm,twist);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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public int tablebaseIndex(TwistyObject object)
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{
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int[][] corners= new int[8][3];
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int[] centers = new int[6];
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int[] twist = new int[8];
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int[] freePerm = new int[4];
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int[] quats = new int[8];
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getCorners(object,corners);
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int result1 = computeFaceColors(corners,mFaceColors);
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if( result1<0 ) return result1;
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int result2 = checkAllCornersPresent(corners);
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if( result2<0 ) return result2;
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int result3 = getCenters(object,centers);
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if( result3<0 ) return result3;
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if( !TablebaseHelpers.permutationIsEven(centers) ) return ERROR_TWO_CENTERS;
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int center_perm_num = TablebaseHelpers.computeEvenPermutationNum(centers);
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int result4 = retFreeCornerPermutation(freePerm,corners);
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if( result4<0 ) return result4;
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computeCornerQuats(quats,corners,freePerm);
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int[] freeLoc = new int[4];
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for(int f=0; f<4; f++) freeLoc[f] = TBSkewb.computeLocation(f,quats[FREE[f]]);
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if( !TablebaseHelpers.permutationIsEven(freeLoc) ) return ERROR_FREE_CORNERS_NOT_EVEN;
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TBSkewb.computeCornerTwists(twist,quats);
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int total = 0;
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for(int i=0; i<8; i++) total += twist[i];
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if( (total%3)!=0 ) return ERROR_CORNER_TWISTED;
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int totalTwist = twist[0]+ 3*(twist[1]+ 3*(twist[2]+ 3*(twist[3]+ 3*(twist[4]+ 3*(twist[5]+ 3*twist[6])))));
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int sumFixedTwists = twist[FIXED[0]]+twist[FIXED[1]]+twist[FIXED[2]]+twist[FIXED[3]];
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int freeLoc1 = TBSkewb.permFree1(freeLoc[0],sumFixedTwists);
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if( freeLoc[1] != freeLoc1 ) return ERROR_FREE_CORNERS_ROTATED;
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return center_perm_num+ 360*(totalTwist + 2187*freeLoc[0]);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private int getColorIndex2(int face)
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{
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switch(mFaceColors[face])
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{
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case 0: return R.string.color_yellow2;
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case 1: return R.string.color_white2;
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case 2: return R.string.color_blue2;
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case 3: return R.string.color_green2;
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case 4: return R.string.color_red2;
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case 5: return R.string.color_orange2;
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}
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return -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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348
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private int getColorIndex3(int face)
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{
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switch(mFaceColors[face])
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{
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case 0: return R.string.color_yellow3;
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case 1: return R.string.color_white3;
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case 2: return R.string.color_blue3;
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case 3: return R.string.color_green3;
|
|
357
|
case 4: return R.string.color_red3;
|
|
358
|
case 5: return R.string.color_orange3;
|
|
359
|
}
|
|
360
|
|
|
361
|
return -1;
|
|
362
|
}
|
|
363
|
|
|
364
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
365
|
|
|
366
|
private int getColorIndex4(int face)
|
|
367
|
{
|
|
368
|
switch(mFaceColors[face])
|
|
369
|
{
|
|
370
|
case 0: return R.string.color_yellow4;
|
|
371
|
case 1: return R.string.color_white4;
|
|
372
|
case 2: return R.string.color_blue4;
|
|
373
|
case 3: return R.string.color_green4;
|
|
374
|
case 4: return R.string.color_red4;
|
|
375
|
case 5: return R.string.color_orange4;
|
|
376
|
}
|
|
377
|
|
|
378
|
return -1;
|
|
379
|
}
|
|
380
|
|
|
381
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
382
|
|
|
383
|
private String cornerError(Resources res, int face0, int face1, int face2)
|
|
384
|
{
|
|
385
|
int j0 = getColorIndex3(face0);
|
|
386
|
int j1 = getColorIndex3(face1);
|
|
387
|
int j2 = getColorIndex4(face2);
|
|
388
|
|
|
389
|
String c0 = res.getString(j0);
|
|
390
|
String c1 = res.getString(j1);
|
|
391
|
String c2 = res.getString(j2);
|
|
392
|
|
|
393
|
return res.getString(R.string.solver_generic_missing_corner,c0,c1,c2);
|
|
394
|
}
|
|
395
|
|
|
396
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
397
|
|
|
398
|
private String centerError(Resources res, int face)
|
|
399
|
{
|
|
400
|
int color = getColorIndex2(face);
|
|
401
|
String clr= res.getString(color);
|
|
402
|
return res.getString(R.string.solver_generic_missing_center,clr);
|
|
403
|
}
|
|
404
|
|
|
405
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
406
|
|
|
407
|
public String error(int index, Resources res)
|
|
408
|
{
|
|
409
|
switch(index)
|
|
410
|
{
|
|
411
|
case ERROR_CORNER_135_MISSING : return cornerError(res,1,3,5);
|
|
412
|
case ERROR_CORNER_134_MISSING : return cornerError(res,1,3,4);
|
|
413
|
case ERROR_CORNER_125_MISSING : return cornerError(res,1,2,5);
|
|
414
|
case ERROR_CORNER_124_MISSING : return cornerError(res,1,2,4);
|
|
415
|
case ERROR_CORNER_035_MISSING : return cornerError(res,0,3,5);
|
|
416
|
case ERROR_CORNER_034_MISSING : return cornerError(res,0,3,4);
|
|
417
|
case ERROR_CORNER_025_MISSING : return cornerError(res,0,2,5);
|
|
418
|
case ERROR_CORNER_024_MISSING : return cornerError(res,0,2,4);
|
|
419
|
|
|
420
|
case ERROR_CENTER_0_MISSING : return centerError(res,0);
|
|
421
|
case ERROR_CENTER_1_MISSING : return centerError(res,1);
|
|
422
|
case ERROR_CENTER_2_MISSING : return centerError(res,2);
|
|
423
|
case ERROR_CENTER_3_MISSING : return centerError(res,3);
|
|
424
|
case ERROR_CENTER_4_MISSING : return centerError(res,4);
|
|
425
|
case ERROR_CENTER_5_MISSING : return centerError(res,5);
|
|
426
|
|
|
427
|
case ERROR_CORNERS_CANNOT : return res.getString(R.string.solver_generic_corners_cannot);
|
|
428
|
case ERROR_CORNER_TWISTED : return res.getString(R.string.solver_generic_corner_twist);
|
|
429
|
case ERROR_TWO_CENTERS : return res.getString(R.string.solver_generic_two_centers);
|
|
430
|
case ERROR_TWO_CORNERS : return res.getString(R.string.solver_generic_two_corners);
|
|
431
|
|
|
432
|
case ERROR_FREE_CORNERS_NOT_EVEN: return res.getString(R.string.solver_generic_free_corners_odd);
|
|
433
|
case ERROR_FREE_CORNERS_ROTATED : return res.getString(R.string.solver_generic_free_corners_rotated);
|
|
434
|
}
|
|
435
|
|
|
436
|
return null;
|
|
437
|
}
|
|
438
|
|
|
439
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
|
440
|
|
|
441
|
public int[][] solution(int index, OperatingSystemInterface os)
|
|
442
|
{
|
|
443
|
if( mSolver==null )
|
|
444
|
{
|
|
445
|
mSolver = ImplementedTablebasesList.createPacked(os, ListObjects.SKEW_2.name() );
|
|
446
|
}
|
|
447
|
|
|
448
|
return mSolver!=null ? mSolver.solution(index,null,os) : null;
|
|
449
|
}
|
|
450
|
}
|
|
451
|
|